Locking device for yarn carrier bars



LOOKING DEVICE FOR YARN CARRIER BARS Original Filed July 14, 1935 2 Sheets-Sheet l INVENTOR.

Apw-fifl 7 MM w. M. GROSSE LOCKING DEVICE FOR YARN CARRIER BARS Original Filed July 14, 1933 2 Sheets-Sheet 2 6 Z Z 0 Am m QM L Q w w M 7 u/ I w a INVENTOR 714% 2/. /m

Patented Apr. 7, 1936 PATENT OFFICE LOCKING DEVICE FOR YARN CARRIER BARS William ,M. Grosse, Greensboro, N. 0., assignor. by direct and mesne assignments, of one-half to Mock, Judson, Voehringer Co. Inc., a corporation of New York, and one-half to F. Osborne Pfingst, Greensboro, N.

Original application July 14, 1933, Serial No.

680,383. Divided and this application September 22,1933, Serial No. 690,580

This invention relates to a locking device for selectively locking and releasing the carrier bars of a full fashioned knitting machine and has for its primary object the provision of asimplified device that functions automatically through the action of the carrier bars to automatically lock and release the latter.

An object of theinvention resides in the unique manner of designing and associating the component parts of each locking device so that an incoming carrier bar will automatically lock itself and automatically release an outgoing carrier bar.

Another object of the invention resides in the location of the sets of pins and locking dogs so that the carrier bars in their progressive selective travel from one end of the textile knitting machine to the other will be progressively locked and released for accurately controlling the progressive travel of yarn carriers for progressively knitting courses in a stocking successively of different yarns.

A feature of the invention resides in the redesigning of the ends of the carrier bars to automatically function with component parts of the locking device to selectively and accurately lock and release each of a group of carrier bars.

With these and other objects in view the invention will be better understood from the 1'01- lowing" detailed description taken in, connection with the accompanying drawings, wherein:

Figure 1 is a perspective view of a group of carrier bars associated with a pair of locking devices.

Figure 2 is a perspective view of one end portion of one of the carrier bars.

Figure 3 is a top plan view of one of the locking devices.

Figure 4 is a vertical sectional view of one of the locking devices on the line 4-4, Figure 1.

Figure 5 is a sectional view of the locking device on the line 5-5, Figure 1.

Figure 6 is a sectional view of the locking device on line 6-4, ,Figure 1.

This invention relates to divisional subject matter set forth in my co-pending application -filed July 14, 1933, Serial Number 680,383,

wherein I have disclosed an attachment v for' knitting into the finished stocking in orderly repeated sequence separate independent silk yarns of substantially the same color and character,-thereby compensating for the irregulari- 4 Claims. (01. 66-127) ties in silk yarn, such as variations in the evenness thereof. To enable this accomplishment at least three yarn carrier bars are used,

selectively and successively operated to first move one yarn carrier to the left and then an associated second yarn carrier to the right and then a third yarn carrier to the left and repeating such operations to knit the stocking from three separate independent silk yarns. As described in the Zabove mentioned application, I provide three separate silk yarns 5, 6 and I and utilize three of the usual set of carrier bars of a full fashioned textile knitting machine as designated by thenumerals l3, It and 5 to knit the three yarns throughout the area of the stocking. Secured to the yarn carrier bars are the usual yarn carriers It for laying the yarns 5, 6, and I in proper position in relation to the bank of needles 20. I arrange a locking device at each end of the carrier bars so as to automatically lock and release carrier bars in their selected travel to the right and left and further prevent rebounding of the carrier bars when reaching their limit of travel in either direction. Each of the can'ier bars I3, l4, and I5 has each end shaped to provide a cam smface 49 and associated with this cam surface is an adjustably mounted catch plate 50 that has a notch 5Lfor coaction with certain parts of the locking device. To enable adjustment of the catch plate and assure proper registration of the notch 5| with a part of the locking device hereinafter described, the catch plate is provided with adjustment slots 52 in which are adjustably mounted screws 53 engaging with the carrier bar. Referring to Figures 3 to 6 illustrating views of the left looking device, it will be noted that the locking device. consists of a block 54 adapted to be fixed to a part. of the frame of the textile knitting machine. This block pivotally supports fingers 55, '58, and 51, one for each carrier bar. Each finger is plvotally mounted intermediate its ends with one end yieldably engaging a spring 58 and its other end 59 forked and loosely engaging the head 60 of a dog 6| that is adapted to detachably engage the notch 5|. Pins 62, 63 and 64 are slidably mounted in the block and each pin coacts individually with each carrier bar, that is to say, surface cam 49 of a carrier bar is adapted to ride into engagement with a pin for elevating the same for selectively releasing the dog 6| from the notch 5| in a manner now to be described.

Referring to Figure 3, it will be noted that the fingers are designed to have overlapping engagement with each other and have portions offset so that the pin associated with one carrier bar will be operatively related with the dog associated with another carrier bar so that when the cam surface of one carrier bar moves into sliding engagement with its associated pin, this pin will be raised vertically to displace its associated finger and release a dog associated with another canier bar.

Referring toFigure 4, I have indicated one carrier bar locked in the block, that in to say, this carrier bar is locked by the lowermost dog 6| illustrated in Figure 4 and this bar has further raised pin 62 for elevating the uppermost dog illustrated in Figure 4 to release its bar which has traveled to the right. The incoming bar illustrated will engage pin 63 and due to the offset arrangement of the finger 56 associated therewith the dog 6| that has locked its bar will be released allowing the locked bar to travel to the left as indicated by the arrow.

Referring to Figures 3 and 4, bar I5 is in locked position and in engagement with dog 6| of finger 56 and pin 62 of finger 55 and bar H is about to enter block 54 for engagement with dog of finger 51 and pin 63 thereby elevating finger 56 and releasing dog 6| from the notch of bar 15 so that the same may be free to travel to the right. Thus, it will be appreciated that I provide automatic action for selectively looking and releasing the carrier bars for travel to the left and to the right.

Due to the fact that the catch plate 50 is adiustably secured to the yarn carrier and this catch plate directly carries the notch 5|, it will be appreciated how I can accomplish fine adjustments for accurate engagements of the carrier bar with the locking devices thereby assuring accurate locking of the yarn carriers in either of their two final positions of travel.

This is very important as the knitted qualities of the stocking depend to a great extent upon the accurate and uniform travel of the yarn carriers.

In concluding, I wish to stress the importance of the unique design and corelation of the simplified parts of the locking devices so that simple automatic operations are assured in the selective travel of the yarn carrier bars. This is brought about by the relative positions of and simple design of the fingers so that they will have offset engagement with the sets of pins and sets of dogs to enable a pin of one carrier bar to operate the dog of another carrier bar. It is, of course, to be understood that various other designs of fingers and operating elements for the operation of the dogs by the pins may be designed without departing from the spirit of the invention and further the pins may be operated in other ways than directly by the carrier bars and therefore I do not desire to be limited in protection in any manner whatsoever, except as set forth in the following claims: 7

What I claim is:

1. In combination, a set of yarn carrier bars having cam shaped extremities, a stationary block, a set of pins slidably supported by said block, one for each carrier bar and adapted to be operated by the cam shaped extremities of said carrier bars in the movement thereof, a set of dogs, one for each carrier bar slidably supported by said block for movement into locking and unlocking engagement with the carrier bars and spring pressed fingers establishing an operative connection between said pins and said dogs.

2. In combination, a set of three carrier bars, cam shape catch plates adjustably associated with the extremities of the carrier bars, each catch plate having a locking notch, a fixed block, a set of three pins mounted in vertical sliding movement in the block and actuated by the cam shaped plates in the movement of the carrier bars, a set of three locking dogs slidably supported by the block for movement into interlocking engagement with the notches of said catch plates and a set of three spring pressed fingers pivotally connected to said block overlying said pins and having offset extremities connected to said dogs whereby an incoming bar will raise one of said pins and actuate the dog of an adjacent previously locked carrier bar.

3. A locking device for yarn carrier bars comprising a block, a row of three pins slidably supported by said block, a row of three dogs slidably supported by said block and arranged in parallel relation with said pins and a spring pressed set of three fingers pivotally mounted on said block, one of said fingers establishing a connection between the first pin of the row and the last dog of the row, the second finger establishing a connection between the second pin of the row and the first dog of the row and the third finger establishing a connection between the third pin 01 the row and the second dog of the row whereby incoming and outgoing yam carrier bars may be successively locked and unlocked in the reciprocating movements thereof.

4. In combination, a set of yarn carrier bars having cam shaped extremities, a block, a set of operating elements slidably supported by said block, one for each carrier bar and adapted to be operated by the cam shaped extremities of said carrier bars in the movement thereof, looking means for each carrier bar slidably supported by said block for movement into locking and unlocking engagement with the carrier bars, and movably mounted fingers extending in parallel spaced relation with ,the carrier bars and supporting said locking means in offset positions relative to the fingers whereby each of said fingers establishes an operative connection between the operating element of its associated carrier bar and the locking means of an adJacent carrier bar.

WILLIAM M. GROSBE. 

